Knife-sharpener.



A. VON BEUST.

KNIFE SHARPENER.

APPLICATION FILED FEB. 11, 1902.

905,638. Patented Dec. 1,1908.

. improved sharpening device showing a knife ANTON VON BEUST, OF ORANGE.NEW JERSEY.

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Specification of Letters Patent.

Patented Dec. 1, 1908.

Application and ma 11, 1900. semi No. 415,305.

To all whom it may concern? Be it known that I, ANTON von BEUST, acitizen of the United States, residing at Orange, in the county of Essexand State of New Jersey, have invented new and useful Improvements inKnife-Sharpeners, of which the following a specification. I

This invention relates toknife Sharpeners, and consists essentially of aring-like device having the sharpening surface on its inner periphery incontradistinetion to other sharpening devices against the outer eriphcryof which knives and other imp ements to be sharpened are applied.

The primary object of the invention is to provide a simple and effectivedevice for sharpening knives that can be used on a dining table andwherein a knife may be dis-.

posed and quickly sharpened by rocking, or completely rotating thedevice.

The ring-like device having the sharpening surface at its innerperiphery would to some extent injure the back edge ofa knife bladeunless some means was provided for shielding such edge, and for thispurpose a protectoris used and removably applied over the back edge ofthe blade of the knife to be sharpened and operates not only to preventinjury to the body of the knife blade intermediate the back and cuttinedges, but also disposes the blade at an ang e relatively to ahorizontal plane with advantages in sharpening the cutting edge of theblade.

In the drawing: Figure 1 is a perspective view of the improvedsharpening device showing a. knife dis osed therein in proper positionand' provi ed with the back protector. Fig. 2 is a horizontal section ofthe in position therein. Fig. 3 is an elevation of the sharpening deviceshowin the angle of the'blade. of a knife during the sharpeningoperation. Fig. at is a detail perspective view of a slightmodification.

Similar characters of reference are employed to indicate correspondingparts in the several views.

The numeral 1 designates the ring-like sharpening de ice having an outerflat peripherg 2 and an inner convex periphery 3. This ring-like deviceis preferably composed of some plastic substance combined with a grittymaterial that is exposed at the inner convex periphery 3 for contact andoperation with respect to a knife blade. It ,has been found that clay,such as china clay,

to which fine sand, emmy,.carborundum or other sharpening substance isadded or applied to'the inner convex surface or periphery 3, isetlicient in the composition of the sharpening ring or ring-likedevice'embodying the features of the invention.

Over the back of the knife blade a protector 4 is removably mounted andconsists of a bent or doubled strip of sheet metal of such length as tofully shield the back edge of the knife blade and prevent injury theretoby the abrasion of the sharpening substance exposed at the innerperiphery or con vex surface 3. This protector also serves to disposethe blade of the knife at an angle to the inner periphery or convexsharpening surface 3, as shown b Fig. 3, to bring the cutting edge ofthe knife blade in proper position for sharpening relatively to theconvex surface against which it is placed. After the blade is sharpenedthe protector may be readily removed, and it will be found that theknife blade has not been scratched orsurface 3 and at the same time theblade is drawn'longitudinally or pushed backwardly and forwardly throughthe ring or ringlike device by a gradual movement or with a quick actionas may be desired, with the result that the cutting edge of the bladewill soon become sharp and with material advantage in the use of thesharpening device in that the sharpening surface will be evenly worn anda new surface continually brought into engagement with the cutting edgeof the blade. The outer fiat periphery 2 of the ring or ring-like devicewill materially aid in maintaimng the same in upright position andfacilitate the rolling or oscillating action. 7

The improved sharpening device may be made in different sizes and alsomanufactured and sold at a minimum price.

Fig. 4 illustrates a slight modification of the sharpener and consistsin forming the body 5 of se mental shape, or a part of a ring. Bothforms of the device, however,

in operation may be rocked or oscillated manually in sharpening theknife blades that may be disposed against the sharpening surface. Inthej'ring-like body shown by Figs. 1, 2 and 3, a complete rotation ofthe body may ensue during the sharpening op eration.

Having thus fully described the invention, what is claimed as new, is:

1. As an improved article of manufacture, a flat knife blade sharpeningdevice consisting of a curved body manually movable in reversedirections and having a narrow width, an outer flat surfaceto bear on asupport in an upright position andprovided with an inner convexsharpening surface, the body being. composed of a plastic material and agritty substance, the flat blade being rested at an angle to andreciprocated in longitudinal directions over the said convex sharpeningsurface.

2. A sharpening device consisting of a ring-like body having an outerflat periphery for disposing the body in upright position and freelyrolling it on a supporting surface, and an inner convex sharpeninsurface supplied with a gritty substance and against which the'knifeblade is held in flat condition.

.3. A sharpening device consistin ring-like body having an outer of a atperiphery and an inner convex sharpening surface and composed of clayand a gritty an upright position and provided with an.

inner convex sharpening surface against which the flat blade is restedat an angle and reciprocated in opposite longitudinal directions throughthe device.

5. A devlce for sharpening the flat blades of knives consisting of acurved body having an outer fiat surface and an inner convex sharpeningsurface, the body being supported by the outer fiat surface while arock' ing movement is imparted thereto and the knife blade in flatcondition movable freely over different parts of the surface in atransverse, direction as well as longitudinally of the latter.

In testimony whereof I have hereunto set my hand in presence of twosubscribing Witnesses.

ANTON VON BEU ST. Witnesses WILLIAM MILNE, WILHELM THEURER.

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